CVE-2021-23509

Prototype Pollution

This affects the package json-ptr before 3.0.0. A type confusion vulnerability can lead to a bypass of CVE-2020-7766 when the user-provided keys used in the pointer parameter are arrays.

Affected

json-ptr

CVSS v3.1 NVD

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 SNYK

5.6 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS v2.0 NVD

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

1.83% chance of exploitation in the next 30 days, 79th percentile

Published

2021-11-03

Updated

2024-09-16

Proof-of-concept exploits (2)

• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1767165
• https://snyk.io/vuln/SNYK-JS-JSONPTR-1577291

Security advisories

• flitbit/json-ptr%23security-vulnerabilities-resolved
• flitbit/json-ptr/pull/42
• advisories/GHSA-8gwj-8hxc-285w

References

• CVE Record
• NVD entry